CN100590943C - Air ground line downward link and method for ground line assembly - Google Patents
Air ground line downward link and method for ground line assembly Download PDFInfo
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- CN100590943C CN100590943C CN200710002963A CN200710002963A CN100590943C CN 100590943 C CN100590943 C CN 100590943C CN 200710002963 A CN200710002963 A CN 200710002963A CN 200710002963 A CN200710002963 A CN 200710002963A CN 100590943 C CN100590943 C CN 100590943C
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Abstract
The invention relates to a power transmission line and discloses a method for aerial earth wire lead-down connection and earth wire assembly. The method comprises the following steps that: material for aerial earth wire lead-down connection is selected; The assembling method of aerial earth wire lead-down connection is that: steel stranded wires along a concrete pole body are bundled and fixed onthe concrete pole body by steel wires; the steel stranded wires runs upwards through a guide anchor ear and a steel crossarm, then run upwards through a diagonal draw bar, a ground anchor ear, a poletop and a U-shaped bolt; a parallel groove clamp is used to fasten lead-down wires on the aerial earth wires; two earth wires with the prescribed length are welded into one; two ends of round steel are intensively welded with galvanized earth wire tips; a earth wire groove is dug to be of a U shape; firstly, the earth wires are buried near a pole tower tightly, then extend along the U-shaped earthwire groove and are buried to form a U-shaped earth wire; a resistance value of the earth wires is detected; if the same stable value which meets the design stipulation is obtained, the earth wires can be put into use. The method for aerial earth wire lead-down connection and earth wire assembly has convenient operation, reliable connection and low cost of construction and detection.
Description
Technical field
The present invention relates to the defeated modified line road of electric power, be specifically related to the method that a kind of overhead ground wire draws lower link and earth connection assembling.
Background technology
Transmission line, every cement pole have overhead ground wire, and all there are interstitial defect in cement pole and cement cross-arm.Respectively having one about two straight-bars is the gap; respectively there are two about the strain insulator bar and all have the gap, cause overhead ground wire to lose its due protective effect, add the gap that exists on the earth connection on the joint again; one round thunder and lightning hits; overhead ground wire is because the discharging lightning current is obstructed, and thunder and lightning is very fast to be connected with live wire, causes arc grounding; and arc short-circuit; because short circuit sharply strengthened electric current and voltage, then burn mashed watt bottle for a short time, blow lead, ground wire, greatly then can cause down bar, major accident such as tower.Particularly the short-circuit voltage electric current also can seriously impact the main transformer in transformer station, power plant, causes the serious accident of various electric equipment blasts, burning.
As shown in Figure 1, before the present invention made, all there was the gap in every cement pole 1* top, and there is the gap in cement cross-arm 1*.Be welded on cement pole 1* top U type punching bolt steel pipe and top cement cross-arm punching bolt steel pipe and the U shape steel tube that is welded on cross-arm two, when casting, block the steel pipe eyelet with paper.Because cement mortar flows in the steel pipe eyelet and cement blocks up eyelet, during construction, as long as the staff knocks the eyelet of being sealed by cement open, goes in U-bolt and cross-arm punching bolt just.Do not consider whether to have corrosion and cement mortar and cement separator.Fastening having got well just finished connection work.Overhead ground wire 6* draws the thunder and lightning inflow place will be by the steel pipe in the bolt cross-arm, again by the reinforcing bar in the pole and bar ground connection the end of a thread of welding and underground earth connection UNICOM down, discharges lightning current.Add the corrosion separator that gap on earth connection the end of a thread that the construction earth connection forms and metal junction produce.Article one, circuit exist on the bar, so many interstitial defect under the bar.When lightning current hits overhead ground wire,,, be that general porcelain vase dodges to iron to burn out and is interrupted tripping operation if lightning current is little because overhead ground wire increases to the earth resistance of earth connection; If lightning current is superpower when line voltage distribution, the arc grounding arc short-circuit will take place, blow lead, ground wire.If have the mashed porcelain vase of burning to make lead and porcelain vase dialysis, permanent large tracts of land and network large-area power-cuts can take place.The various electric equipments of transformer station are blasted simultaneously, are burnt out, and its loss will be huge.
Summary of the invention
(1) technical problem that will solve
The purpose of this invention is to provide a kind of easy to operately, connect reliably, can guarantee that overhead ground wire, earth connection connect the method that gapless overhead ground wire draws lower link and earth connection assembling.And under the situation that guarantees personal safety, can hot line job.
(2) technical scheme
In order to achieve the above object, the present invention takes following scheme:
Overhead ground wire of the present invention draws the method for lower link and earth connection assembling, and following steps are arranged:
1) select overhead ground wire to draw the material of lower link: to comprise the steel strand wire, parallel groove clamp, the iron wire that are used for downlead;
2) overhead ground wire draws the assembly method of lower link: steel strand wire downstream mud electric pole body and function iron wire pine bundle be fixed on the cement electric pole body; Upwards steel strand wire are passed to lead and draw anchor ear and iron cross arm, up pass brace again, draw anchor ear with passing again, pass masthead and U-bolt; With parallel groove clamp downlead is fastened on the overhead ground wire; Steel strand wire with iron wire pine bundle are fastened on the cement electric pole body again, and are fastening with parallel groove clamp and earth connection;
3) two earth connections of specific length are welded as one (having welded when preparing material before construction), unit concentrates at the steel two ends the zinc-plated ground connection the end of a thread of welding, ground connection the end of a thread concentrates welding can avoid in the middle of the construction because detonation pressure, the gap that binding causes, the situation of having avoided simultaneously fighting for electric welding machine in the construction occurs; The ground connection duct is scraped out the U type, bury earth connection near the cement electric pole place earlier, and then bury formation U type earth connection along the prolongation of U type ground connection duct;
4) detect the resistance value of earth connection, if obtain the identical stationary value that meets design code, this earth connection can come into operation.
Wherein, the iron wire of described step 1) is No. 10 iron wires, and the model of steel strand wire is GJ-35, and the model of parallel groove clamp is G-1.
Wherein, when the shaft tower of described step 3) was single ray type, U type earth connection was one; If during cubic ray sections tower, U type earth connection is two.
Wherein, when described step 4) detects the resistance value of earth connection, if shaft tower is single ray type, must obtain one group of two identical stationary value that meet design code, earth connection can come into operation; If cubic ray sections tower must obtain two groups of two identical stationary values that meet design code, earth connection can come into operation;
Wherein, the ground connection the end of a thread in the described step 3) is centralized and unified zinc-plated ground connection the end of a thread.
(3) beneficial effect
1, owing to adopt above scheme, the present invention is easy to operate, connects reliable; 2, owing to adopted downlead, earth connection is concentrated welding, unified assembling, and on-the-spot the detection makes overhead ground wire, earth connection form one, guarantees that the line junction do not have the gap, can rapidly lightning current be discharged; 3, because earth connection is concentrated welding, guarantee need not the outdoor study of bonding machine, reduced operating cost, improved operating efficiency; 4, under the situation that guarantees personal safety, can hot line job.
Description of drawings
Fig. 1 is the strain insulator cement electric pole schematic diagram of not transforming;
Fig. 2 is the improved strain insulator cement electric pole of a present invention schematic diagram;
Fig. 3 is the schematic diagram of U type earth connection of the present invention.
Among the figure, 1*, cement pole and cement cross-arm; The punching bolt of 2*, cement cross-arm steel pipe band gap; The punching set bolt of 3*, cement cross-arm band gap; 4*, G-1 parallel groove clamp; The joint of band gap after 5*, steel pipe explosion pressed connector or the colligation; 6*, overhead ground wire; 1, cement pole and cement cross-arm; 2, cement cross-arm steel pipe punching bolt; 3, cement cross-arm punching set bolt; 4, earth connection parallel groove clamp; 5, ground connection unit steel pad; 6, overhead ground wire; 7, No. 10 iron wires; 8, the GJ-35 steel strand wire are as the downlead of overhead ground wire; 9, press the ground connection unit steel (, can weld) of design code length if length is not enough; 10, the zinc-plated ground connection the end of a thread that welds on the earth connection; 11, the earth connection joint of unified welding; 12, press the ground connection unit steel of design code length.
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
As Fig. 2, shown in Figure 3, a kind of overhead ground wire of the present invention draws the method for lower link and earth connection assembling, and following concrete steps are arranged:
1) H-frame pole of every cement pole, select material: subtract the downlead 8 that one meter GJ-35 shaped steel twisted wire is made overhead ground wire with the high length of bar, usefulness G-1 type parallel groove clamp 4 is fastening, with No. 10 iron wires 7 fixedly GJ-35 shaped steel twisted wire on the cement body of rod 1.
2) material that the circuit that newly sets up increases is few, and operating circuit can live line working except that single pole can not keep safe live line working.Conscientiously carry out under the monitoring and construct.In order to prevent the swing of GJ-35 steel strand wire, the upper boom operating personnel fix steel strand wire two to three places with No. 10 iron wire 7 pine bundles earlier, and up pulling is passed to lead and drawn anchor ear and iron cross arm, passes brace again, draws anchor ear with passing again, passes masthead cross-arm and U-bolt again.The GJ-35 steel strand wire, be fastened on the overhead ground wire with G-1 parallel groove clamp 4.Lower beam the suitable again fastening steel strand wire of the body of rod of No. 10 solid iron wires 7 of pine, is used two G-1 parallel groove clamps 4 more then, and downlead and earth connection are tightened up.So just finish overhead ground wire and drawn work down.
3) earth connection of the present invention comprises the earth connection of single ray type and cubic ray type ground connection and new construction line.First steel of each basic shaft tower of Design of length in accordance with regulations, two all respectively weld the ground connection the end of a thread through unification degree zinc.Unit's steel termination unification is welded into the earth connection of a specific length, and earth connection is transported to the scene, and the ground connection duct is scraped out the U type.Single ray type cement electric pole tower is constructed into the U type, buries near the shaft tower place earlier, and then digs to bury and prolong and buried this root U type earth connection.When detecting earth connection, can obtain one group of two identical stationary value that meet design code, be that U type earth connection is gapped if any different and unstable explanation.Cubic ray type is transformed into two groups of U type earth connections.When detecting earth connection, can obtain two groups, two identical stationary values that meet design code.As unstable and to have common value all will eliminate just qualified.
With the unified welding of earth connection, construct into U type earth connection, solved the deficiency of welding machine, all tool materials of lifting the welding earth connection have been deducted, all unfavorable factors that the anxiety of transportation and detonation pressure earth connection headband come have been saved track investment, the construction of the earth connection of accelerating to be independent of each other.Ground wire testing method has been arranged, stopped the workmen and rehearsed, the workmen can't be rehearsed.Superiority, the reliability of Here it is U type earth connection.Give later long-time running simultaneously, obtain during the repetition measurement earth connection and for the first time identical stationary value, if difference is improved, improved U type earth connection will add underproof earth connection to be fastened on and continue on the improved earth connection to use.
Earth connection is the lifeline of transmission line safe operation, has only strict construction, strict control personnel's responsibility, used ground wire testing method, just can thoroughly eliminate overhead ground wire this significant deficiency of gap to the earth connection, the workmen can't be rehearsed, also can accurately measure with ground wire testing method even done vacation.The transformation earth connection digs the degree of depth of burying and must do according to design code, just can obtain the earth connection of stationary value.This is a method of eliminating the common three big defectives that exist of electrical power trans mission/distribution system, and the gap of earth connection is one of three big defectives.
Claims (4)
1, a kind of overhead ground wire draws the method for lower link and earth connection assembling, it is characterized in that following steps are arranged:
1) select overhead ground wire to draw the material of lower link: to comprise the steel strand wire, parallel groove clamp, the iron wire that are used for downlead;
2) overhead ground wire draws the assembly method of lower link: steel strand wire downstream the mud electric pole be fixed on the cement electric pole with iron wire pine bundle; Upwards steel strand wire are passed to lead and draw anchor ear and iron cross arm, up pass brace again, draw anchor ear with passing again, pass masthead and U-bolt; With parallel groove clamp downlead is fastened on the overhead ground wire; Steel strand wire with iron wire pine bundle are fastened on the cement electric pole again, and are fastening with parallel groove clamp and earth connection;
3) two earth connections of specific length are welded as one, first steel two ends are concentrated and are welded zinc-plated ground connection the end of a thread, and ground connection the end of a thread concentrates welding can avoid construction central because detonation pressure bundlees the gap of causing, and the situation of having avoided simultaneously having fought for electric welding machine in the construction occurs; The ground connection duct is scraped out the U type, bury earth connection near the cement electric pole place earlier, and then bury formation U type earth connection along the prolongation of U type ground connection duct;
4) detect the resistance value of earth connection, if obtain the identical stationary value that meets design code, this earth connection can come into operation.
2, a kind of overhead ground wire as claimed in claim 1 draws the method for lower link and earth connection assembling, it is characterized in that: when the cement electric pole of described step 3) was single ray type shaft tower, U type earth connection was one; During for cubic ray sections tower, U type earth connection is two.
3, a kind of overhead ground wire as claimed in claim 1 or 2 draws the method for lower link and earth connection assembling, it is characterized in that: when described step 4) detects the resistance value of earth connection, if cement electric pole is single ray type shaft tower, must obtain one group of two identical stationary value that meet design code, earth connection can come into operation; If cubic ray sections tower must obtain two groups of two identical stationary values that meet design code, earth connection can come into operation;
4, a kind of overhead ground wire as claimed in claim 1 draws the method for lower link and earth connection assembling, and it is characterized in that: the ground connection the end of a thread in the described step 3) is centralized and unified zinc-plated ground connection the end of a thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710002963A CN100590943C (en) | 2007-01-30 | 2007-01-30 | Air ground line downward link and method for ground line assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710002963A CN100590943C (en) | 2007-01-30 | 2007-01-30 | Air ground line downward link and method for ground line assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101237135A CN101237135A (en) | 2008-08-06 |
| CN100590943C true CN100590943C (en) | 2010-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710002963A Expired - Fee Related CN100590943C (en) | 2007-01-30 | 2007-01-30 | Air ground line downward link and method for ground line assembly |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692547A (en) * | 2009-09-08 | 2010-04-07 | 国网电力科学研究院 | Vertically grounding down-leading method for external side of composite material tower and tower thereof |
| CN101692546A (en) * | 2009-09-08 | 2010-04-07 | 国网电力科学研究院 | Vertically grounding down-leading method for center of composite material tower and tower thereof |
| WO2011029311A1 (en) * | 2009-09-08 | 2011-03-17 | 国网电力科学研究院 | Method for vertically grounding and leading down from outer side of composite material pole tower and pole tower thereof. |
| CN101692545A (en) * | 2009-09-08 | 2010-04-07 | 国网电力科学研究院 | Vertically grounding down-leading method for internal side of composite material tower and tower thereof |
| CN102312597B (en) * | 2010-07-02 | 2015-09-23 | 国家电网公司 | Multifunctional composite material rod tower |
| CN102761086A (en) * | 2012-03-22 | 2012-10-31 | 江苏省电力公司兴化市供电公司 | Device for lowering lightning stroke trip-out rate of electric transmission line by utilizing coupling ground wire |
| CN104795748B (en) * | 2015-05-06 | 2016-08-31 | 国家电网公司 | A kind of method of operating of continuous charged renewal Grounding Grids |
| CN109904637A (en) * | 2019-02-22 | 2019-06-18 | 东莞职业技术学院 | Vertical ground structure and its construction method in a kind of power transmission and transformation line |
-
2007
- 2007-01-30 CN CN200710002963A patent/CN100590943C/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 架空电力线路的防雷保护. 陈明月.农村电工，第8期. 2006 |
| 架空电力线路的防雷保护. 陈明月.农村电工，第8期. 2006 * |
| 浅谈架空线路杆塔的防雷接地. 李仲权.广西电业，第1期. 2006 |
| 浅谈架空线路杆塔的防雷接地. 李仲权.广西电业，第1期. 2006 * |
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| CN101237135A (en) | 2008-08-06 |
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